Method and apparatus for coefficient scan based on partition mode of prediction unit

摘要

Provided are a method and an apparatus for coefficient scan on the base of a partition mode of a prediction unit. The method comprises the steps of: determining a scan method on the basis of a partition mode of a prediction unit; and encoding the information about the scan method, wherein the scan method is determined, on the basis of RDO (Rate Distortion optimization), from among the extracted candidate scan methods which have been extracted with consideration of the shapes of the partitions of the partition mode.

主权项

1. A method of decoding a video signal having a current block to be decoded with a decoding apparatus, comprising:
obtaining, from the video signal, residual samples of a current block and index information relating to the current block,
the index information being signaled to select a collocated picture from a plurality of previously decoded pictures,the collocated picture being representative of a picture including a collocated block which is used to derive a temporal motion vector candidate of the current block; obtaining a spatial motion vector candidate from a spatial neighboring block of the current block; selecting, based on the index information, the collocated picture relating to the temporal motion vector candidate of the current block from the plurality of the previously decoded pictures; obtaining the temporal motion vector candidate from the collocated block included in the selected collocated picture; generating a motion vector candidate list by arranging the spatial motion vector candidate and the temporal motion vector candidate in order of priority; deriving a motion vector predictor based on the motion vector candidate list and a candidate index of the current block,
the candidate index specifying one of motion vector candidates included in the motion vector candidate list; obtaining prediction samples of the current block by using the motion vector predictor; and reconstructing the current block by using the residual samples and the prediction samples.